- Introduction
- Quick Start
- Table Design
- Data Loading
- Data Export
- Using StarRocks
- Reference
- SQL Reference
- User Account Management
- Cluster Management
- ADMIN CANCEL REPAIR
- ADMIN CHECK TABLET
- ADMIN REPAIR
- ADMIN SET CONFIG
- ADMIN SET REPLICA STATUS
- ADMIN SHOW CONFIG
- ADMIN SHOW REPLICA DISTRIBUTION
- ADMIN SHOW REPLICA STATUS
- ALTER SYSTEM
- CANCEL DECOMMISSION
- CREATE FILE
- DROP FILE
- INSTALL PLUGIN
- SHOW BACKENDS
- SHOW BROKER
- SHOW FILE
- SHOW FRONTENDS
- SHOW FULL COLUMNS
- SHOW INDEX
- SHOW PLUGINS
- SHOW TABLE STATUS
- UNINSTALL PLUGIN
- DDL
- ALTER DATABASE
- ALTER TABLE
- ALTER VIEW
- BACKUP
- CANCEL BACKUP
- CANCEL RESTORE
- CREATE DATABASE
- CREATE INDEX
- CREATE MATERIALIZED VIEW
- CREATE REPOSITORY
- CREATE RESOURCE
- CREATE TABLE AS SELECT
- CREATE TABLE LIKE
- CREATE TABLE
- CREATE VIEW
- CREATE FUNCTION
- DROP DATABASE
- DROP INDEX
- DROP MATERIALIZED VIEW
- DROP REPOSITORY
- DROP RESOURCE
- DROP TABLE
- DROP VIEW
- DROP FUNCTION
- HLL
- RECOVER
- RESTORE
- SHOW RESOURCES
- SHOW FUNCTION
- TRUNCATE TABLE
- DML
- ALTER ROUTINE LOAD
- BROKER LOAD
- CANCEL LOAD
- DELETE
- EXPORT
- GROUP BY
- INSERT
- PAUSE ROUTINE LOAD
- RESUME ROUTINE LOAD
- ROUTINE LOAD
- SELECT
- SHOW ALTER
- SHOW BACKUP
- SHOW DATA
- SHOW DATABASES
- SHOW DELETE
- SHOW DYNAMIC PARTITION TABLES
- SHOW EXPORT
- SHOW LOAD
- SHOW PARTITIONS
- SHOW PROPERTY
- SHOW REPOSITORIES
- SHOW RESTORE
- SHOW ROUTINE LOAD
- SHOW ROUTINE LOAD TASK
- SHOW SNAPSHOT
- SHOW TABLES
- SHOW TABLET
- SHOW TRANSACTION
- SPARK LOAD
- STOP ROUTINE LOAD
- STREAM LOAD
- Data Type
- Auxiliary Commands
- Function Reference
- Date Functions
- Geographic Functions
- String Functions
- Aggregation Functions
- Bitmap Functions
- Array Functions
- cast function
- hash function
- Crytographic Functions
- Math Functions
- Utility Functions
- System variables
- Error code
- System limits
- SQL Reference
- Administration
- FAQ
- Deployment
- Data Migration
- SQL
- Others FAQs
- Benchmark
- Developers
- Contribute to StarRocks
- Code Style Guides
- Use the debuginfo file for debugging
- Development Environment
- Trace Tools
- Integration
Edit
STDDEV,STDDEV_POP
description
Syntax
STDDEV(expr)It returns the standard deviation of the expr expression.
example
MySQL > select stddev(scan_rows)
from log_statis
group by datetime;
+---------------------+
| stddev(`scan_rows`) |
+---------------------+
| 2.3736656687790934 |
+---------------------+
MySQL > select stddev_pop(scan_rows)
from log_statis
group by datetime;
+-------------------------+
| stddev_pop(`scan_rows`) |
+-------------------------+
| 2.3722760595994914 |
+-------------------------+keyword
STDDEV,STDDEV_POP,POP
Edit
In this article